Timing device



P. s. LUTTR-ELL ET AL TIMING DEVICE.

Filed March 21. 1921' 2 Sheets-Sheet 1 IN V EN TORS PRU S, A UTTIr Sept. 4, 1923. 1,466,842

P, s. LU'TTRELL ET AL TIMING DEVICE Filed March 21 1921 2 Sheets-Sheet 2 fry. 5

" P1901. c. Rosin;

" T4; ATTORNEYS.

I INVENTORS P1704 s. 4,ur-7 ?4L Patented Sept. 4,1923. 7 i

** UNITED STATES PATENT OFFICE.

PAUL.S.I1UTTRELL Ann PAUL o. nosrrn, or OAKLAND, CALIFORNIA.

. TIMING DEVICE.

- n licatibafiieammh 21, 1921.1 iseriarno. 453,924..

(1'0 QZZw/ LOIILitflldif/COILQQTIH V I Be it known that we, PAUL S. LUTTR LL and PAUL C. Rosina, citizens ofthe United States, and residents of Oakland, county of Alameda, and State of California, have invented a certaln new and useful Tim ng Detion.

The invention relates to timing devices and particularly to what may be known as interval clocks or clocks that are adapted to be set to run for a predetermined period of time, and at the end of that period stop runter described to make it fool-proof, simple and substantial and cheap to manufacture. Another object of the invention is to providean improved alarm trip mechanism.

A'fiu'therobject of the invention isto provide means for preventing, turning of the winding key in the wrong direction.

The invention possesses other advantageous features, some of which, with the fore going, will be set forth at length in the followingdescription,where we sh all outline in' full, that form of the invention which we have selected for illustration in the drawings accompanying and forming part of thev present specification. Insaid drawings, we have shown one embodiment of our invention. but it is to be understood that we do not limit ourselves to such form, since the invention, as expressed inthe claims, may be embodied in a plurality of forms.

Referring to said drawings Figure 1 is a front elevation of the device of our invention.

Fig' 2 is a side elevation of the mechanism, removed from the casing.

F 19;. 3 is an enlarged section ofthe wind inn mechanism.

Fig. 4; is a front view of the alarm trip controlling disc,

Fig. is a similar view on a larger scale,

showing the position of the parts when the alarm mechanism is released. I

Fig-6 is a rear viewof the alarmtrip controlling disc. Fig. 7 is a detail of the gear for releasing the alarmtrip controlling device.

vice, of which the'followingis a specificawhich the indicator hand 7 moves. 7 ,clockmechanism is divided into two groups,

I Fig. 8 a detail of the coacting gear for preventing reverselrotation of the winding key. r v

Fig. 9;is a detail, of the mechanism for locking together the alarm shaft and the time shaft. y r

' Fig. 10 is a rear elevation on an enlarged scale, of the timing device, with the winding key removed. i

The device comprises a suitable casing 2 in which the clock mechanism is disposed,

the mechanism being arranged between suitable bearing plates 3, 4 and 5. The casing is provided with a graduated dial 6, over The one group of gears operatingan alarm device and the other, gear. train operating the indicator hand and a trip mechanism for the alarm. The alarm bell 8 is preferably disposed. within the casing.

The alarm spring 9 and the time spring 12 are. wound the key 13, means being providedvvhereby the initial rotation of the key 13,:in this instance the'first tworevolutions ofthe key, winds the alarm, and the further rotation of the key winds both the alarm springQand the time spring 12 and moves the indicator, hand 7 over the dial (3 to the desired setting. The alarm spring shaft 1 5"is hollow and the time spring shaft 16 extends through the alarm spring shaft andthethrec bearing plates3, 4, 5, and carries the indicator hand on its forward end. At its rear end, the alarm spring shaft. 15 is provided with a squared extension 17 on which seats the gear or disc 18, having a single tooth 19. This gear 1s provided on its rear surface with single depression ratchet 21, which is engaged the spring =pressed pawl 22, pivoted to the gear or dlSC 23,

fwhich is also provided with a single tooth 24-. The gear 23 is loosely mounted on the time shaft 16 and is disposed directly behind the 18, so that the pawlengages the ratchet 21 when the gear is turned in the winding direction. The gear 23 is provided on its rear face with hollow extension or neck25 which passes through the bearing bridge 26 and which is provided with bayonet slots 27 for engagement with pins 28 on the shank of the key. Rotationof the "key 13 in the winding direction, therefore causes arrangement, the key may be turned back wardl reely, alter the alarm has been wound a distance equal to the amount of winding, but no further. and before winding, be key cannot be turned bachwa rd. hen the alarm is tripped, the alarm spring shaft rotates backward and such movement is also halted by the Genevastop gear. In the present construction this gear is designed to permit three full turns of the key in winding and setting, but no more.

Means are provided for causing engagement of the key with the time spring shaft 16 to wind the time spring and set the indicator, alter the key has been rotated a definite distance in. winding the alarm. in the present instance, after the alarm shaft has been given two full turns. Secured to the time spring winding shaft 16, in the present instance by engagement with the screw threaded portion 32 thereof, and hearing against the end of shaft 15, so that it rotates with shaft 16, is a gear 33 having a single tooth 34-. which engages with a Geneva stop gear 35, rotatably mounted on the rear face of gear 23. The Geneva stop gear is so disposed, that after two complete revolutions of the gear 23, the Lieneva stop 35 ams in engagement with the tooth and causes the shafts 15 and 16 to rotate in unison. V

Secured to the front end 36 of the shaft 16, is the indicating hand 7, which moves over the dial as the shalt is rotated. Secured to the shaft 16, behind the dial, is a disc 37 having a notch 38 therein, which controls the alarm trip lever which is attached to the vibratory shaft of the alarm lnimmer ell. hen the trip is released, the shaft vibrated by the alarm mechanism and the alarm is sounded. ii hen the in dicator points to zero on the dial, the end 0''? the trip lever 3S)v overlies the notch 38. and when the in dicator is moved over the dial. the disc is moved through a corresponding angle. so that as the indicator is moved haclnvard toward zero by the clock mechanism, the disc synchronously moved backward, bringing the notch under the end of the trip lever when the indicator rmmhcw cro, thus tracing the end oi the trip lever and permitting it to vibrate.

Means are provided for stopping the alarm after it has sounded for a predetermined time and for preventing the alarm from sounding while the alarm spring is being wound and before the indicator is fllihen the eccentric portion 13 is contiguous to the notch 38, the notch is open and when the \oncentric portion it is contiguous to the notch. the notch is closed. in Fig. 4-, the notch is shown closed, and in Fig. 5 is shown open. The plate @112 is continually pressed in a direction tending to close the notch, by a spring 45, secured to the disc and engaging a bearing plate hi on the plate 42.

Means are n'ovided :for opening the notch and holding it open for the inter all during which it is desirable to have the alarm sound. Journaled in the bearing plates 3, i and 5 is a shaft 4-7, lmring an arm lb cured thereto at the forward end, the are-n lying in front of the plate 4-2. The a 'zu i8 is pressed inwardly by a spring 19, surrounding the shalit a7. [\t its end the arm 48 is provided with a tooth 51. adapted to engage a pin 52 on the plate 42 and hold the plate against the action oi? the spring 4-5, thereby holding the notch open. it its rear end. the shaft -il-7 is provided with an arm 5 3. secured thereto, which lies between the Geneva stop gears 29 and 5+ journaled on the shaft 31. The lower ieneva stop gear 5i is provided on its upper surface with a pin 55, which, as the Geneva gear 54 rotates, moves into engagement with the arm 5 :3, moving it outward and consequently moving the arm 48 out *ard, releasing the pin and permitting the plate 4-2 to move to close the notch. The pin is so placed that itengages the aru'i 53 and moves it outward, just as the key reaches its initial unwound position.

The Geneva stop gear 5-11; is rotated by one'agmnent with the tooth 19 on the gear 18, which is fixed to the alarm shatt 15.

The clock mechanism is stopped when the indicator moves back to zero. by on agemejutol the pin 56, on the rear face o? the disc 37, with a stop 57 on the bearing plate The pin 56 is preferably disposed in a short circum'licreutial slot 5b in the disc 37. to permit rotation of the disc througl h 360 to give the device a setting range over the whole dial.

in operation. the hey is turned to wind the alarm. and time springs. and more the indicator through the desired angle on the dial. Th indicatruis then moved backward over the dial. by the action of the main clock spring l2 controlled by the escapement movement 59, which is connected by suitable gearing with the main driving gear (31, which is in t ght frictional engagement with the indicator sha'tt 16. iVith the arrival of the indlcator hand at-zero, the alarm trip is attached to said released, the alarm sounded, causing a reverse movement of the shaft 15, which operates the m chanism to'close the notch and stop the alarm. V

The dial may be graduated in any desired time llIlluS and the timing mechanism is constructed to move the indicator over the dial indicator over the dial at a speed corresponding to the fi e claim: r l. In a timing device, an alarm mechanism and its spring" actuated drivingmechanism an indicator, at the front of the device and a spring actuated driving;

'adnations of the dial.

connected to the alarm mechanism and the other of which is connected. to the indicator driving mechanism, a key at the rear of the device for turning the alarm mechanism shaft, and means connected to the key and operative after connilete' revolution of the alarm mechanism shaft, shafts together. I H

2-. In timing device, an alarm nechanisin and its spring actuat-ed driving: mechanism, an indicator and a spring actuated driving mechanismtherefor, a shaft connected to the arm mechanism, a shaft connected to the indicator driving mechanism, a gear secured. the first'shaft, a secoi gear rotatable second gear ratchet tooth on the for securing said adapted to a first gear in one rectii said ratchet tooth, a key second gear, and means for limiting the motion of said key, in the oppodircction. i I

In a timing device, an alarm mechanism and its spring); actuated driving mechanism, an indicator and a springactuated driving mechanism therefor, a shaft connected to the inainnmechanism, a shaft connected to the' indicator driving mechanism, kev coneeted to saidiirst shaft, means operative by more than one revolution of the key in the winding direction for securing said shafts together, and times for limiting the reverse movement of the hey.

4. ln a timing device, an alarm mechanism and its spring; actuated driving; mechanism, an iinl'icator and a spring! actuateddriving mecllhnisin therefor, a shaft connectedlo the alarm inechanisn'i, a shaft connected to the indicator driving); mechanism, a sleeve in nably mounted on thelast named shaft, afwindinglze'v on said. sleeve, means formautomatic coupling between sa id the named shaft-to turn said the sleevelinnnison, and other me ns i h the sleeve adapted to form automatic coupling between the sleeve indicator for movement of the second gear and the second named shaft when the sleeve and theiir named shaft have been turned "nism, an indicator and a spring actuated driving mechanism therefor, a shaft con nected to thealarm mechanism, a shaft con ,nected to'the indicator driving mechanism, :Ft gea1'"secured to sa d alarm shaft, a second disposed uXially with respect to said fli'rst, ear and adapted to engage saidfirst ar'uponrotationof the second gear in one tnrection, a tooth on said second gear and a reverse rotation stop gear arranged to be "engaged'hy'said tooth to stop rotation in the 1opposite direction. mechanism there j for, a pair of concentric shafts,rone of which driving mechanism therefor, a pair of shafts onedisposedavithin theother, one of said shafts being connected to the alarm mechanism and the other being connected to the "driving mechanisn n winding means engaging; said first shaft and surrounding said second shaft, a toothed element secured to said second shaft and a Geneva stop gear arried by the winding means and arranged to engage said tooth.

7, ln a timing device, an alarm mechanisniand itsispringactuated driving mocha nism, anindicator and aspringfactuated driving: mechanism therefor. a pair of shafts one disposed within the other, one of said shafts being connected mule alarm mechanism and thc other being connected to the indicator driving: mechanism, a disc ar ranged to ennagresaid first shaft, :1, cylindrical extension on said. disc surrounding said second "Shaft, a winding key attached to said extension, a toothed element secured to said secondshaft and disposed within said projection, and aGeneva stop :ear rotataloly mounted onsaid disc and disposed to engage said toothed element.

8. In a timing device, an alarm mechanism and its sprin actuated driving mechanisi n, an indicator and spring actuated dr Jinn mechanism therefor, a shaft to winch said indicator is secured, a notched discsecui ed to said shaft and an clarmtrip ineclmnisin engaging the iieriphery of said disc andadapted to ,be released by movement ofthe disc to bring the notch into cooperative relation with the trip mechanism,

said tri mechanism includin a sector )late operatively mounted on the indicator shaftL 9, In a, timing; device, an alarm mechanism and itsspring actuated driving mechanism, an indicator and a spring actuated driving. mechanism therefor, a shaft to which saidindicator is secured, a notched disc movablewith said shaft, an alarm trip mechanism engaging the periphery of the disc and adapted to be released by movement of the notch into registry with the end of the trip meel'ianism, and a sector plate operative by the subsequent rotation ot the alarm Slltl'tt, for closing said notch.

10. in a timing device, an alarm mechanism and its sriirii'ig actuated driving mechanism, a indicator and a spring actuated driving mechanism therefor, a shaft to which said indicator is secured, a notched disc movable with said shatt, an alarm trip mechanism engaging the periphery ol? the disc and adag ited to be released by movement ot the notch into registry with the end ot the trip mechanism, a plate arranged contiguously with said disc and having a portion-adapted to overlie and. close said notch, an arm controlling the movement of said plate, and means operative by the movement of the alarm shaft for moving said arm.

11. In a timing device, an alarm mechanism and its spring actuated driving mechanism, an indicator and a spring actuated d riving mechanism theretor, a shaft to which said indicator is secured, a notched disc movable with said shalt, an alarm trip mechanism engaging the periphery of the disc and adapted to be released by move- -nent of the notch into registry with the end of the trip mechanism, a plate arranged cOI1- tiguously with said disc and having a portion adapted to overlie and close said notch, said plate bcini; in frictional contact with said disc, a pin on said plate, an arm adapted to engage said pin and hold the plate against movement during motion of the diSc to open sa d notch, and means operative by the movement of the alarm shaft for moving said arm to release said. plate.

'12. in a timing device, an alarm mechanism and its sinking actuated driving mechanism. an indicator and a spring actuated driving mechanism therefor, a shaft to which said indicator is secured, a notched disc movable with said sha't't, an alarm trip mechanism engaging the periphery of the disc and adapted to he released by movement of the notch into registry till the end of the trip mechanism, a plate arranged contiguously with said disc and having a portion adapted to overlie and close said notch, said plate being in trictional contact with said disc, a pin on said plate, an arm adapt ed to engage said pin and hold the plate against movement during motion of the disc to open said notch, means operative by the movement of the alarm shaft for movingsaid arm to release said. plate, and a spring secured to the disc and. hearing against the plate to move the plate to close the notch.

,3. In a timing device, an alarm mechanism and its spring actuated driving mechanism, an indicator and a spring actuated driving mechanism therefor, a shaft 1.; which said indicator is secured, a notched disc movable with said shatt, an alarm trip mechanism engaging the periphery of the disc and adapted to be released by move ment ot the notch into registry with the end of the trip mechanism, a plate arranged contiguously with said disc and haw ing' a portion adapted to overlie and close said notch, said plate being in frictional contact with said disc, a pin on said. plate, an arm adapted to engage said pin and hold the plate against movement during motion of the disc to ogcn said notch, a ehatt to which said arm is secured, an arm on the other end of the sha'it, a gear on the a arm .shalt, a gear in n ash therewith, and means on the second gear for engaging said second arm to releac said plate.

In a timing device, an alarm mechanism and its spring actuated driving mechanisn'i, an indicator and a spring actuated driving mechanism thereit'or, a shaft to which said indicator is secured, a disc secured to said shaft, a stop pin mounted on said disc and a tixed top adapted to be engaged by the pin to stop the indicator driving mechanism.

in a timing device an alarm mechanism and a spring actuated driving mechanism, an indicator. a spring actuated driving mechanism theretor, means for winding the alarm mechanism, means 'l ori'ning a. coupling to wind the indicator actuating spring and to turn the indicator hand in one direction when the alarm spring has been wound a predetermined amount, and, means for manually turning the indicator hand inde endently oil the alarm winding mechanism. and the; coupling means in tho opposite direction, said manual means also adapted to unwind the iiulicator driving spr ngs 1.l)filiil(ill2tl amount. 7

,6. in a timing device of the character described a shaft, a main spring adapted to be wound thereby. an indicator hand sccured to said shaft, a sleeve turnably mountml on tae shalt. a second sleeve turnahly mounted on the shaft, an alarm spring adapted to be wound thereby, an alarm mechanisn'i actuated by the alarm spring. a winding key on the first named sleeve, means on said sleeve engageable with the second named sleeve to permit llllfi'iil'lf: of the sleeves in unison, and other means 'lorn'iing an autonnrtic coupling between the lirst named sleeve and the shaft when both sleeves have been turned in unison a predetermined distance.

l7. in a timing device of the character described a shaft, a main spring adapted to be wound thereby. an indicator hand so cured to said shaft, a sleeve turnably moanted on the shaft, a second sleeve turnahly mounted on the shaft, an alarm spring adapted to be wound thereby, an alarm mechanism. actuated by the alarm spring,

a winding key on the first named sleeve,

and adapted to form a lock between the.

first named sleeve and the shaft to turn the same when both sleeves have been turned in .unison a predetermined distance. l

18. in a timing device of the character described a shaft, a main spring adapted to be Wound thereby, an indicator hand secured to said shait, a sleeve turnably mounted on the shaft, a second sleeve turnably mounted on the shaft, analarm spring adapted to be Wound thereby, an alarm mechanism actuated by the alarm spring, a Winding key on the first named sleeve, means on said sleeve engageable with the second'named sleeve to permit turning of the sleeves in unison, other means forming an automatic coupling between the first named sleeve and the shaft when both sleeves have been turned in unison a predetermined distance, and an alarm release mechanism actuated by the second named sleeve. I r

19. In a timing device of the character described, an alarm mechanism, a spring actuated driving mechanism operating the same, an indicator hand, a spring actuated driving mechanism therefor, a key for Winding the'alarm mechanism spring, automatically actuated means forming a coupling to Wind the indicator spring when,

the alarm spring has been turned a predetermined distanceand to turn the indicator hand, and means for manually turning the indicator hand independently of the alarm Winding key and the automatic coupling,

said manual means also adapted to un- Wind the indicator driving spring.

In testimonywvhereof We have hereunto set our hands at San Francisco, California, this 9th day of March, 1921, and the 8th day of October, 1919, respectively,

PAUL s. LUTTRELL. PAUL o. ROSKE. 

